1 EXHIBIT 4.2 [FRONT OF STOCK CERTIFICATE] BIOCHEM PHARMA INC. REGIE PAR LES DISPOSITIONS DE LA PARTIE 1A DE LA LOI SUR LES COMPAGNIES (QUEBEC) GOVERNED BY THE PROVISIONS OF PART 1A OF THE COMPANIES ACT (QUEBEC) LE CAPITAL-ACTIONS AUTORISE DE LA COMPAGNIE EST CONSTITUE D'UN NOMBRE ILLIMITE D'ACTIONS SANS VALEUR NOMINALE. THE AUTHORIZED SHARE CAPITAL OF THE COMPANY CONSISTS OF AN UNLIMITED NUMBER OF COMMON SHARES WITHOUT PAR VALUE. CUSIP 09058T 10 8 NUMERO - NUMBER ACTIONS - SHARES Les presentes attestent que This certifies that est le detenteur enregistre de is the registered holder of ACTIONS ORDINAIRES SANS VALEUR NOMINALE ENTIEREMENT LIBEREES ET NON SUJETTES A APPELS DE VERSEMENTS DU CAPITAL-ACTIONS DE COMMON SHARES WITHOUT PAR VALUE, FULLY PAID AND NOT SUBJECT TO CALLS, OF THE SHARE CAPITAL OF BIOCHEM PHARMA INC. L'inscription des transferts des actions representees par ce certificat ne peut etre faite aux livres de la Compagnie que par le detenteur inscrit en personne ou par son mandataire dument autorise par ecrit, sur remise de ce cetificat dument endosse, sous reserve des exigences des lois regissant la Compagnie. Ce certificat n'est valide que s'il est contresigne par l'agent des transferts et inscrit par l'agent charge de la tenue des registres de la Compagnie. EN FOI DE QUOI, la Compagnie a fait signer ce certificat par ses officiers dument autorises. Entry of the transfers of the shares represented by this certificate may be made in the books of the Company only by the registered holder in person or by his attorney duly authorized in writing, upon surrender of this certificate properly endorsed, subject to compliance with the requirements of the laws governing the Company. This certificate shall not be valid unless countersigned by the Transfer Agent and registered by the Registrar of the Company. IN WITNESS WHEREOF, the Company has caused this certificate to be signed by its duly authorized officers. Date/Dated: CONTRESIGNE ET INSCRIT - COUNTERSIGNED AND REGISTERED TRUST GENERAL DU CANADA, Montreal, Toronto GENERAL TRUST OF CANADA, Montreal, Toronto AGENT DES TRANSFERTS ET AGENT CHARGE DE LA TENUE DES REGISTRES TRANSFER AGENT AND REGISTRAR PAR - PER: --------------------------------------------------- REPRESENTANT AUTORISE - AUTHORIZED REPRESENTATIVE LE PRESIDENT, LE PREMIER VICE-PRESIDENT, FINANCES, ADMINISTRATION ET TRESORIER, PRESIDENT SENIOR VICE-PRESIDENT, FINANCES, ADMINISTRATION AND TREASURER L'INSCRIPTION DU TRANSFERT DES ACTIONS REPRESENTEES PAR CE CERTIFICAT PEUT ETRE FAITE AUX PRINCIPALES PLACES D'AFFAIRES DE TRUST GENERAL DU CANADA A MONTREAL ET A TORONTO. REGISTRATION OF THE TRANSFER OF THE SHARES REPRESENTED BY THIS CERTIFICATE MAY BE MADE AT THE PRINCIPAL OFFICES OF GENERAL TRUST OF CANADA IN MONTREAL AND TORONTO. 2 [BACK OF STOCK CERTIFICATE] LE TEXTE QUI SUIT EST UN SOMMAIRE DES DROITS, PRIVILEGES, THE FOLLOWING IS A SUMMARY OF THE RIGHTS, PRIVILEGES, CONDITIONS ET RESTRICTIONS AFFERENTS AUX ACTIONS DU CONDITIONS AND RESTRICTIONS ATTACHING TO THE SHARES OF THE CAPITAL-ACTIONS DE LA COMPAGNIE DONT LE TEXTE COMPLET SERA SHARE CAPITAL OF THE COMPANY, THE FULL TEXT OF WHICH WILL BE FOURNI, SANS FRAIS, SUR DEMANDE. PROVIDED WITHOUT CHARGE UPON REQUEST. ACTIONS ORDINAIRES COMMON SHARES Les porteurs d'actions ordinaires auront The holders of Common Shares are entitled to one vote per droit a un vote par action et ont droit de recevoir les share, to receive such dividends as the board of directors of dividendes que le conseil d'administration de la Compagnie the Company may delcare and, in the event of the liquidation peut declarer et de recevoir le reliquat des biens de la or dissolution of the Company, to receive the remaining assets Compagnie en cas de dissolution ou de liquidation. of the Company. Pour valeur recue, le (la) soussigne(e) vend, cede et For value received, the undersigned hereby sells, assigns and transporte, par les presentes, a transfers unto INDIQUER LE NUMERO D'ASSURANCE (Box)(Box)(Box)-(Box)(Box)(Box)-(Box)(Box)(Box) PLEASE INSERT SOCIAL INSURANCE SOCIALE DU CESSIONNAIRE NUMBER OF TRANSFEREE ____________________________________________________________________________________________________________________________________ actions _____________________________________________________________________________________________________________________________ shares du capital-actions representees par le present certificat et of the share capital represented by the within certificate, constitue par les presentes and does hereby irrevocably constitute and appoint ____________________________________________________________________________________________________________________________________ son mandataire irrevocable, avec plein droit de delegation Attorney to transfer the said shares on the securities des pouvoirs conferes, pour le transfert desdites actions registers of the within named Company with full power of dans les registres des valeurs mobilieres de la Compagnie. substitution in the premises. Date ______________________________________________________ Temoin Signature _____________________________________________________ Witness ___________________________________________________ AVIS : LA SIGNATURE A CETTE CESSION DOIT CORRESPONDRE, EN NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST CORRESPOND TOUS POINTS, AU NOM TEL QU'ECRIT AU RECTO DU CERTIFICAT, WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE, SANS AUCUNE ADDITION, ALTERATION OU MODIFICATION. IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT, OR ANY CHANGE WHATEVER.