ce to the seller specifying the nature of the right or claim of the third party within a reasonable time after he has e aware or ought to have e aware of the right or claim.Р(2) The seller is not entitled to rely on the provisions of the preceding paragraph if he knew of the right or claim of the third party and the nature of it.РArticle 44РNotwithstanding the provisions of paragraph (1) of article 39 and paragraph (1) of article 43, the buyer may reduce the price in accordance with article 50 or claim damages, except for loss of profit, if he has a reasonable excuse for his failure to give the required notice.РSection III. Remedies for breach of contract by the sellerРArticle 45Р(1) If the seller fails to perform any of his obligations under the contract or this Convention, the buyer may: